A lot will depend on how old your MH is, how you define "general maintenance" and how much work you you do yourself. I bought a 1996 MH is 2004. I have put $12,000 in it so far in 10 years. Half are mods and upgrades like headers,FF mufflers, CAI, suspension mods,front end repair,auto park repair etc the other half was fluid chgs (oil,trans,diff,brakes,genset) tires. I did most of the work myself except for headers, front end, and suspension work. So I spent $1200 per year for every thing that broke, modded or maintained. On a newer MH I would expect "general maintenance" to be $600/yr if you do the work yourself. Hope this helps.