My tenant moved in July 2019 and has been 8-12 days late on rent every month, disregards my notices and avoids me like the plague till she's ready to pay.

Disregard this post.

You could pay them an appraisal fee and watch the magic, learn, and possibly pick up a skilled partner for the futureIf you are an appraiser, then please disregard that and move on to the next deal. 

An LLC taxed as a disregarded entity is a separate legal entity, but payments for work between you and the LLC wouldn't be respected for federal income tax purposes. 

If you are sole owner of it all, the tax reporting isn’t any different, and it will still all be on your schedule E of your return anyways since all of the LLC would be disregarded entities in this instance. 

Single member LLC's are disregarded entities if involved in a lawsuit.

I just have a duplex now, so not scaling immediately and won't have a big initial deposit/maintained balance - ideally looking for something with a low monthly fee (or low required balance to disregard that), and where I can create a ton of sub-accounts easily enough.

 I think we will need to see links to know what the heck you are talking a bout, a quick google search did not reveal that answer....I am illiterate please disregard this post.

So many questions about a regular llc: member managed, manager managed, disregarded, etc. 

@Zach LincolnGreat advice from @Ashish Acharya.Generally the easiest structure when first starting out is either to hold directly with great insurance (landlord and umbrella) or via an LLC that is taxed as a disregarded entity or partnership, also with great insurance.Definitely speak with your attorney and CPA before you implement anything.