If I use a RMLO service I assume they cover the Dodd Frank and other consumer rules?

Only a couple exceptions exist to their caveat emptor doctrine. 

Covering this with my salary is relatively comfortable.  

I'm going to try and see if any of the long term neighbors want to do it, lots of pre-gentrification folks still here who might be happy to.

For me as well as the seller.First, you have to define Sub to financing.Do you mean the reckless kind where you overpay for a property, take over the financing and borrow from others to cover closing costs and holding costs when you have no money, no credit, no income, no reserves and can't tell a warranty deed from a deed of trust and you close on the kitchen counteror do you meanbuying below market value, already having a nice income, having reserves, using escrow and title, already understanding the due on sale clause, have done a lot of creative purchases and know when to use and when not to use creative finance and how to recover if something goes amiss?

Now IF you have all those bases covered, my tips are: Take GREAT pictures and for the love of all that is holly please no close ups, wide angel pics.

The 2 units that are rented are covering the mortgage so yes there's room to lower the price on the other 2.

See if they will pre approve you for a line of credit.  

- FYI: it's only illegal to try to rent it out, the property owner can usually legally live in a nonconforming basement unit.If you do all this you may still negatively cashflow each month, so make sure your income can cover and/or your cash reserves.If you do this successfully, you will learn more in 1-2 years than you would reading here on BP for 5+ years:)Good luck:)

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.