One factor you didn't mention that will weigh into the decision is the size of the loan. 

I don't think exchanging is your best option since you bought with a low down payment and all the work you have done has essentially set you up to buy the same sized building. 

I don't cut-off based on age I cut off based on building size. 

Something that will happen in my area is lot size, lot size may be the same but if the yard is sloped at 45 degrees it isn't usable and therefore not worth as much as a flat yard. 

If you can find someone with CoStar access, that will give you a lot of info too, depending on size of property you have. 

Hi BP Community, As you head into the New Year and your deal sizes increase you may have questions regarding Freddie/Fannie multi financing.

Not even sure of the mid sized truck as I cant find that information on line.

If you can get away with standard sizes, Surplus Warehouse has great pricing. 

Admittedly I have little experience in looking at houses like this, but what I have seen for a house this size, a complete rehab could be upwards of around $90k depending on finishes.  

Because I’m BRRRRing, the rates vary by rehab size and some other factors but generally they are low 6% for the product I described with a 100k purchase and <30k rehab, ARV around 170k.