I'd love to extend the offer to BP and team up with someone in the community.

The Party Wall Agreement states in fancy legal terms that neither of you are going to do anything to the common wall that will affect the other - ie each of you has an easement extending onto the other person's half of the wall. 

After having a unit vacant for a while and seeing previously-stable tenants leave huge buildings vacant for an extended period, I'm not going for SSNL.

https://www.news10.com/news/ny...NYS Legislature kicking the can down the road by continuing to force property owners to finance and operate their businesses FOR FREE.But they haven't really extended the moratorium, you see - that would be difficult to defend in the public eye. 

I have gotten into new folks first flips after they where in contract, even after closing and found they lost money NOT made money.A 3/1 punch out to a 3/2 even with NO exterior walls moved/roof extended has exceeded $90k (easy) and you may end up more then $90k (for a 3/1 into a 3/2).   

I will have to analyze my numbers again next year before I extend the contract.

After you close, take title, etc, you'll need to extend additional capital to commence renovation, i.e. phase 1. 

Although there was an extended lockdown period, I believe the decisiveness to reopen small businesses such as restaurants ahead of other states substantially helped isolate and limit the economic hardship to tenants and landlords.In a sense, it provided the perception of a light at the end of the tunnel and helped landlords work with tenants on rent payment plans.

The only way I would move forward is if the Seller is willing to extend closing until the units are vacant.

You really want to get a property manager if you can’t keep up on local laws…that’s half the reason I use one  (along with screening and avoiding discrimination lawsuits)1) you only need an addendum that says effective this date the lease will be extended until x/x/x (or will become month to month) with the following changes…the rent to be $xxx, and this and that. 2) BUT, if you give a 45 day notice it will either be unlawful or more likely just ineffective/unenforceable as you are required to give 60 days notice of any rent increases in Nevada.