You should get one that specializes in SEC law and have them prepare a PPM for you.Reg D 506c exemptions from registering for a security only allow you to take accredited investors.Reg D 506b exemptions allow you to take sophisticated, non-accredited investors, but you are prohibited from advertising, which can mean a lot of things. 

You would also benefit from working with a firm that specializes in the legal and advisory side of the process, which is something an IRA custodian such as the firm you mention cannot do directly. 

One rental property puts you at a very special place in the US....but none of us are just wanting to stop at 1.  

Below are some tips to find a Local CPA that specializes in real estate1) Attend a Local REIA / Real Estate meetup and see who other investors are using as a CPA2) Network with other investors from your City/State that you find on bigger pockets and see who they use as a CPA3) Look for CPA's with good google/yelp reviews where 'real estate' is mentioned in the review.4) Verify that your CPA is licensed.

For each property I completed extensive work to increase its rental potential.As 2021 is coming to an end, I am looking for a reliable accountant who specializes in real estate investing to help me with taxes and consult on my LLC.

But, i dont think either of them specialize in Taxes.  

I recently read about the short term rental rules.. is it still a possibility if I would go get a special use permit?

But most of the work on a flip is interior anyway and it usually takes 12 plus weeks, so you can try and wrap up exterior still in November (special low temp paint) or wait until April.Make sure you have heat, if necessary bring in space heaters.

It's sad to say, but most death claims typically pay out around $1MM, but if a child is severely injured and will deal with certain trauma or issues for the rest of their life, that type of claim could jump into the multimillions simply because of the years of special care that child would need for the rest of their life. 

That is why I recommend finding a qualified attorney who specializes in real estate investing to help you through the process.