Disclosures: this post is an anecdote about a Raleigh NC property for illustration purposes; the numbers presented are actual numbers from my Quickbooks report; the Rent-O-Meter price, T-Bill rates (in the links), taxes, insurance, and PM fees will change over time. 

Her pre-tax income just hit $105,000.

Again it depends on how one defines success.

Are you trying to convert a pre-existing room into a bedroom to increase the ARV?

Here are some steps and considerations for ensuring your LLCs are compliant from a legal perspective:For Your SDIRA LLCs in Florida:LLC Registration: You have filed the foreign LLCs with the State of Florida, which is essential.FINCEN Registration: Registering with FINCEN (Financial Crimes Enforcement Network) was a necessary step for compliance with the Corporate Transparency Act.Ongoing Compliance:Annual Reports: Ensure you file annual reports for your LLCs with the Florida Department of State.State Taxes: Check if there are any state-specific taxes or fees you need to pay for the LLCs.For Your Non-Retirement LLC in Nevada Buying Property in Michigan:LLC Registration:Foreign LLC Filing: Once the purchase is finalized, file your LLC as a foreign entity in Michigan.FINCEN Registration:Corporate Transparency Act: As of 2021, the Corporate Transparency Act requires LLCs and other entities to register with FINCEN.

Egress will be required and depending on your municipality you may need rental license or permit.

They bring in right under 4k month all together in rents, claims to only pay property manager about 6k yearly, taxes are about 3,500/y.Comps I have for the same neighborhood range from 60k-145k per property and mobile.

However, investors should be aware that cap rates can vary depending on a number of factors, including the property's location, condition, and amenities. 

But even those areas still suffer from the crushing property tax rate, and the other issues the city has.

Well answer it depends.