Its my house not yours we just allowing some design choices not what components go into it.along with the supply chain is still not perfect we may need to swap something out to keep project going.

hardly, the market does fluctuate here but it's the most dire supply and demand market I've seen (other than some CA beach towns).

I would not sign a lease and buy a bunch of furniture to potentially make $350/month. 

Couldn't agree more with replacement costs... a lot of BnB-ers trash your furniture.

A common issue is supply and demand effected by population changes, construction, economic issues, the job market and location.Personally I haven't seen vacancy issues at this time,  but I have gone through cycles of vacancy issues.

If you are not in Huntsville or Madison proper, you may want to wait out things for a minute, as some of the outlying areas are definitely tilting toward supply exceeding demand now.  

He can also leave any furniture behind and we will clean up.2 – Flexibility to close/move in on date at his convenience.What other suggestions should I make to make my offer better?

But you may be able to do option A for $10k or less in setup & furniture, esp if you buy the place fully furnished.

There is a lot of pent up demand due to high rates and there is still a major lack of new supply.

Replaced furniture and beddings and linens.