Marns feels a tremendous affection and loyalty towards Halifax and made his mind up early to stay around and help the squad rebuild for next season.
And he believes their experiences in the game's third tier will stand them in good stead as they prepare for life back in National Three (North).
"I think I was the second person to sit down and sign up," said Marns.
"I was always going to sign because it has got to the point where I want to stay put.
"Money didn't even come into it. I enjoy playing at Halifax, and being around the lads, and to be quite honest there is no other rugby union club I would want to play for.
"Also it is about wanting to tough it out and try to make things better."
Halifax have only picked up one league victory and were cut adrift at the bottom of the table some weeks ago.
But, perversely, Marns believes there have been plenty of positives to take from a difficult situation which he hopes will ensure the club find some on-field stability in their new surroundings.
"To outsiders the season has been an absolute disaster but for us it has been a good learning process," added Marns.
"What we have found in National Two is that we just haven't been good enough. Obviously off-field situations over the last couple of years have contributed to a certain extent and we knew it was always going to be a struggle.
"Even though we have taken some beatings, there have been games when we have played well only for the opposition to play that little bit better.
"National Two is a tough old league and it has been good to experience playing at that level.
"It will also have stood many of our players in good stead because it has been a massive step up from playing university rugby, which some of the younger ones had been doing, to coming up against seasoned pros.
"Hopefully that means they will find that when they come up against the better teams in National Three, they will have an idea of what to expect and be better prepared.
"I would never say that it is good for a club to get relegated, but maybe as far as Halifax are concerned it is a blessing in disguise.
"It gives us the opportunity to stabilise and then start to build the club up again, whether it takes one, two or even three years."
Marns knows it will be important to get off to a decent start next season and cannot contemplate another season of struggle.
"Winning isn't everything, which might be a strange thing to say after this season, but it is all about playing good rugby, scoring good tries, winning more games than we lose and building up the confidence which has taken a battering this season," he said.
"If we can do that then it would lift the whole atmosphere around the club.
"There is the potential for some good local derbies which always create a bit more interest.
"Obviously we have to avoid another relegation at all costs but personally I think we will sustain ourselves in National Three."
A lot of any regeneration of the club will rely on Halifax building on their junior section and second team in order to give backing to the first XV.
On top of that Marns is keen to assist in raising the club's profile around the area and has offered his services.
"Being a solicitor and working for a firm who are very keen to support local sport can only be an advantage," said Marns.
"I have offered to help with the off-field side of things such as drumming up sponsorship and pushing the club to people I come into contact with through work.
"Whatever the club wants I will do."
Marns also looks set to continue his rugby league career with Batley Bulldogs this summer before returning to Halifax ahead of their next campaign.
"I have every respect for Halifax and for Batley and fair play to Rhys (Morgan), he said he had no problems with me playing rugby league as long as I don't get myself injured!"
"I just want to play for as long as possible.
"I would hate to get to 31 or 32 and wish I could have given it another season."