Their age would have been obvious, so it may be tough to get the bank to replace those (i.e., give you a credit for a new system).The water system, OTOH, may not have been obvious.

Also - check out How to Start Investing In Real Estate at a Young Age.

I would start presenting myself as a clean cut professional at an earlier age too.

Look at the quality of construction, size of the lot, finishes, age, etc.

Depending on the Lender and loan program will determine the utility of your current trade lines and their age.

So screen EVERY occupant over the age of 18.

But, I actually don't think age would be one of our first compromises.

I'm making a very solid income at the age of 21 - about $6k/month with about $1500/mo expenses - by the time I'm 25 I'll be bringing in about $10k/month from my business - maybe more, but I estimate conservatively.

If all the properties with similar beds/bath/garage/size/age/neighborhood and whatever other factors matter in your area are priced from $200-$225, for example, then price yours at $175.

But at that age, you figure "what the hell, I will just do it again"  I did it again in the 1980's, eventually with similar results.Life happens over 45 years of investing and belive it or not, some of it is really bad.