I also saw a video as a suggestion to haveOne main business accountAn account for each property and have them set up to transfer to the main account.

If you have an available unit for resident transfer, offer this immediately.

However, the seller stipulates that i am paying all the transfer taxes and I buy the house AS IS and I am responsible for U&O.

My preference is that I get a paper stating transfer of the security deposit between old and new tenant with signatures of both.

Borrower should be able to transfer out of the LLC at the closing. 

The following IRS pages are good resources for this. https://www.irs.gov/individuals/self-employedhttps://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employeehttps://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxesWhile the rules allow for the transfer of employer 401k plans to a solo 401k plan, if you are still working for the employer that offers the 401k, you may not be able to transfer those funds to a solo 401k plan until you stop working for them. 

If you think you are at risk, max out your liability policy, buy an umbrella policy, and if you still think you may be at risk, form an LLC (don't name it after yourself) and transfer ownership of the property into the LLC.

Then, transfer ownership of the property to the LLC. 

The purchase contract(there is only one when assigning) would be for $100k.The assignment agreement, which transfers that contract to your end buyer, would have the $5,000 fee.

"Good Funds" legislation may require that any simultaneous closing in your state be funded by the original party prior to transferring the property to another party.