Hmmm, can see both sides here.
Personally, I see no issue. I offer low cost services here, though not seeking to make any profit (LOL, to break even would be nice

). Others are here as businesses to make a living - WIM and Dave DND are 2 that spring to mind. Others are making 'pocket money' by doing a bit of buying/stripping/selling. Thats fine, and with few exceptions, is an added benefit to OOF. As would your stuff be.
The flip side, obviously if everyone started charging garage rates to do jobs, then that 'spirit' of the forum would be lost. Its amazing that anonymous strangers here are so willing to put themselves out and help each other for free - possibly one of the key ingredients that makes OOF what it is.
Insurance is an absolute must, esp if you are charging. And this is where I think your overheads may rocket, so you'll need to consider your rates. Additionally, I think the demand will be strong, so you need to consider family etc.