FL has unique tax sale laws I am not exactly sure how you wold work this angle but I bet there is some angle to be worked.

How your 401K fits into meeting your financial objectives during that time would depend on a wide variety of variables.

My primary residence has a unique feature in that it has come with a 20x40ft double-wide manufactured home in the backyard.Previous owner was using it as a shop but it has wood panel walls and beat to hell 50 year old carpet. 

My only recommendation to you right now is to spend the money upfront to be protected and enter this deal with eyes wide open.

If your level of certainty is high that it will re-sell for somewhere in the ballpark of 80K; then I'd pull the trigger.It really is just a different angle of thinking about the deal.

I love real estate but seems like is not for me, I was trying to put a brand new doublewide in it, I got approved for the loan but really don't have a clue about asking price for the property, I asked my realtor and she said 'well just add lot price plus house plus some cash for you' there is no comparables since all the mobile homes I see around are used and old, the price for the cheapest double wide will be close to 55k I was wondering how much should I ask for it , may be not worth maybe I can build a small house for that money??

I have a feeling that I can get $1150 to $1200, but with the wide range from the PMs I am not for sure.

Would an 8" wide handle the irregularities better than a 6" plank?

Also, consider that Conex boxes are limited to things under 8 feet tall and less than 8 feet wide. 

You don't want a wide receiver blocking for a running back.