As many have said the status of the relationship between GC and owner will carry a lot of weight in terms payment terms.

If it is block construction the engineers will make you beef up the slab and add piles to support the new weight of the second floor.

After weighting all of that, does it make the most sense to try to keep this tenant in place? 

There is a lot of weight on marketing, and a lot of inputs to that cycle.

yep your weight in gold.  

If you can’t quantify risk and don’t understand the mechanics of “weighted” average of expected return and range of returns (standard deviation) then you are at a severe disadvantage and should consider a competent investment / financial manager for your investment capital.  

They may or may not have good reasons and unless they communicate those reasons and perhaps even substantiate them I really try not to give them any weight.

Check bed frames and chairs for their weight limits. 

Plus I can see folks stealing those things or trying to break into them  although when they are full up with ammo they would weight a ton :)

BUT for certain rural areas it's worth it's weight in gold because of the reliability factor vs an unreliable or expensive existing utility structure.