You'd have to run numbers to ensure it'll still be cashflow positive as a rental.

It goes a long way to ensuring peace of mind or highlighting red flags that get hidden when people just talk a good game. 

Then, you can absolutely draft a new lease for the tenants to sign and collect the additional money to ensure you have an adequate security deposit.

Then I would add value then refi (I will ensure the seller allows me to refi within the contract) the funds for the refi should cover my balance.

Check with your local RE department to ensure you would not be doing something that would get you into trouble.

A syndicator (or sponsor) of an offering should still take the necessary steps to ensure non-accredited investors are qualified through an investor questionnaire to avoid allowing the wrong kind of investors into their offering. 

Does anyone have any tips and tricks on how I can ensure I meet my deadline.

I'm just being proactive in ensuring that I interact with companies whereby the closing will run most smoothly as it relates to assignments, double closings, etc.

I think you should do some more research on the legalities of what you are doing in your state, and ensure that you are allowed to do what you are doing.

It's my experience that this requirement will almost ensure your success of getting paid in full.