Because I am out of state, I am doing one showing next weekend and am betting this will generate at least one offer.

.($175*15) + ($300*11) = $5925 * 50 ~ $300k --> 45% vacancy by value --> $160kYou can go up, down and all around from there, but I'm willing to bet it'll be hard to go all the way up to $475k, even if the whole park is leased.

3) Would a conventional mortgage be the best bet? 

Your best bet to putting together a spread sheet you can use over and over is to get quotes from local contractors then make that your data base on a per square foot basis, unit basis or per linear foot.

Lots to consider and quite a steep learning curve for you, I'll bet.

@Violet Stanoev Welcome to BP You have several REIA'shttps://www.ccia-info.com/http://careia.org/http://www.chicagoreia.org/This should be a good bet for you to find local investors. 

Again, this is just my hunch but your best bet might be small, local banks. 

You'd be betting on the buy-out price, don't believe it's allowed.

Your best bet is to network and find other investors to exchange contracts with.  

These would be your best bet if looking at properties under 50k.