Problem arise if you buy a owner occupied from either HUD, Fannie Mae or Freddie Mac.

Im a FTHB and I put in an offer on an as is Fannie Mae home and the listing agent advised the bank will only accept offers at asking price and will not dewinterize. 

Hubzu - not very good customer service - buying a Fannie Mae home and Hubzu sent me an owner occupant affidavit after telling the CSR I was not planning on occupying the property. 

Maybe, maybe if your previous job was in the same industry and that job also showed a history for you of the same base salary to bonus income ratio.Google up "B3-3.1-01 General income information Fannie Mae".  

Can anyone comment on how low Fannie Mae would go on a cash offer, no contingencies, no Hubbard, no inspections and close within 3-4 weeks?

A "convetional" loan (sometimes called a "conforming" loan) is a loan governed by Fannie Mae and Freddie Mac (if you recognize those names). 

I suggest you try to use Freddie Mac form 998 or Fannie Mae form 216 to calculate your reserve fund needs - see link below.

The 10 mortgage limit relates to Fannie Mae backed mortgages. 

As far as appraisals go, Fanny Mae now directly backs up the added appraised value of solar on homes with its HomeStyle Energy loan.  

I think you are looking at about .25 cents over the next 2 years:)Here is a guide published by Fannie Mae I came across a couple of years ago.