Your revenues seem very low at 53k/year. 

If they pay low rent then they could still be below average for sales but make a profit.

Someone was in that spot and can shed light on with his/hers experience?

All 3 units are 2/1 designs with new stainless appliances, granite counters, wood grain tile floors, nice lighting, and all have nice private outdoor yards, and plenty of parking.  

C = lower middle class housing, more multi-family mixed in but decent places, some crime but low-level stuff nothing dangerous or violent.

The issue I find in my area is the rents are very low which make it difficult to work the numbers.

And even if I can open a Solo 401K with that low amount, I heard that if I stop making money in my LLC or close my LLC you have to close your Solo 401K and transfer everything into a regular 401K.

He thought the offer was too low.

I was able to offer 1 of the people who got back to me, but it was a little too low and we couldn't make anything work. 

Demand from buyers seems to be decreasing even though inventory remains relatively low.