A single member LLC is treated as a disregarded entity for tax purposes, which means that you shouldn't have extra tax filings (unless your state has a separate return obligation for LLCs).

Of course a prospective lender would not lend to a borrower whose credit history demonstrates chronic pattern of disregarding credit obligations on the same terms they would extend to unblemished credit.  

Make sure you understand what caused that home run.If your rental properties, both Appreciation and Cash flow are making less than $6,000 on a $300,000 investment, then you should divest into the stock market, disregarding the tax implications.Realize you want a less Passive investment and a lot of the BP team could point you to solutions on your current investments. 

Your LLC has to be 100% owned by you and has to be disregarded LLC to have your 1031 respected. 

In that case all of those companies are considered disregarded entitites. 

I would disregard the "risk" of low rental income because you haven't been a landlord before.

You could sell as yourself and buy as yourself or as a disregarded LLC.Now here's where it gets fun - If your property is owned now by an LLC that is itself a disregarded entity (doesn't file a tax return and activity on your personal tax return). 

If so it is a disregarded entity and you could sell as that LLC and buy as yourself or LLC A or LLC B as long as LLC B is also a disregarded entity to you. 

Going a step further; units will also get smaller and smaller as owners need to subdivide units to maximize revenue per sqft and start to all but completely disregard amenities in units.

@Petya TonchevaPlease disregard the post from @Chris Wilson.