The seller says they are flexible on the price since they are avoiding RE fees.

Wondering if it's necessary to have a professional to the accounting work as to not mess it up for tax reasons.

Also any advice on how to lower the tax on my flips. 

Can you please tell me what areas are doing well with rental property investments and which ones I should avoid?

It seems to me they saw a problem and avoided it.

DTIs do not apply, not tax return / personal income eval

30 year fixed, low interest rate DSCR BLANKET loans (put multiple 1-4 unit properties under one loan for cash out or for purchase).Ground Up Construction loans for aspiring developers with NO Experience100% Financing on Fix and Flips (just pay closing costs and prepaid taxes/insurance)Fix and Flip financing that requires no appraisalHELOCS on investment propertiesBuilder's Forwards (for medium to larger developers who want to hedge interest rates on their properties they plan to sell so they can offer "low builders rates").DSCR loans for long term AND short term rentals (I think this is becoming more and more common, but some people have still never heard of this).And so much more!  

Go for the primary residence 2 out of 5 years no taxes.  7. 

I can sell the units hopefully for about 840,000 before realtor fees of 5 percent and whatever I'll be taxed on.

A lot of homeowners like to play lawyer and think they can avoid any liability by having an all-inclusive disclaimer and rental contract.