I'll try and offer up my view, as it's something I did 10 years ago.
I started playing in the mid to late 90's. I played on tournament teams throughout 2000-2004. In 2000-2001 I played for Sin-dicate and Animal Paintball factory in the Mardi Gras Open (Rab's tourney). I was at an event every 3 weeks for nearly 2 years. Even with all my sponsors it was over 20,000 USD out of pocket. I walked away after an event in 2001 for several years because the turmoil and politics of teams and paintball made me lose the love for the game that I had.
I came back for a year in 2004, played NPPL events with Conspiracy. Had a blast, rocked my Joy division angel, playing against the Naughty Dawgs again, hanging out with friends I hadn't seen in a couple years. Great time.
Then my girlfriend wanted to get married and all my paintball money went to ring/marriage.
10 years later, never got married, got a new girlfriend, moving from the US to Dublin, and seriously thinking of pulling the trigger on an Lv1 package and spending some saturdays on the field again, knowing me I'd end up going to mills and cps events, but I think the real answer is...if you have spent more than a year or two, have tried to walk away and come back, it's in you, this sport has its hooks in us, and no one but us understands that.
The intro to Sunday Drivers nearly brings a tear to my eye, because it is everything I have done, everything I've felt, put into a wonderful intro speech.
I don't think we can ever get away, we can only look for a balance of what we can afford (time/money/health) and what we can give. We'll always end up playing/reffing/coaching, no matter what our age is.
55? You're fine, the scariest guy I knew 14 years ago was in his mid 40's played with the original Ironmen, and was the best 1v1 gun I've ever seen, and that's playing/practicing against the Ironmen/XSV/Kapp factory/Iron Kids. To this day, I bet he's still one hell of a gunslinger.
If you can find that balance of life and ball, then enjoy, if not, you'll always have the memories...but hold on to a set of kit just in case