Stick with in home training and market to gay guys.I started training a gay guy on the side about 8-9 years ago.He saw me training at a gym and asked me about lifting cause he saw me bench 500 and asked what I’d did for my arms,long story short he asked if I could train him at his home in Brookline mass(very wealthy area)so I said yeah for 200 an hour and he said sure so I started training him twice a week for 400 then it turned to 3 times for 600 and then his partner joined the sessions and he paid full price for both so 400 a session 2-3 times a week.Wasnt certifiedbor insured and did this for about 4 years and then he introduced me to another gay guy and I was making 1200-1600 a week cash for 4-6 hours.When they hit certain goals they would give me nice bonuses.Original guy was a marathon runnning vegetarian who weighed 130 at 5’6 when we started and he said it I could get him to 150 with abs he would give me a bonus so after 6 months he was there and he gave me 5k cash then his next goal was to bench 225 and he would give me a bonus so we hit 225 for 3 one day and he gave me another 5k cash.He was worth around 50-60 million supposedly so was nothing to him.
So just market yourself where the money is.
A couple of different thoughts here......
1st, nice subtle reference to you 500 pound bench and large arms. Well done, my friend.
2nd, I'm surprised they didn't constantly try to fuck you as we all know gay guys and their agenda.....

3rd, I would love to find a side gig like that.
Finally, I think in SF1900's case, it would not work out as I don't think Rory would appreciate other gay guys being around the house. But, it was solid advice nonetheless. I'm inspired.
Hell, for 5k I'd let em whack me off too!