I taught in a schoolfor a brief 6 months and my students had the bites everywhere.I’m looking to purchase multi unit or commercial property.  

For apartments, I recommend you start with 'Crushing It in Apartments and Commercial Real Estate' by Brian Murray. 

So we went into the commercial space and pivoted to self-storage.

Has anyone in this forum ever acquired an apartment with a HUD loan through a loan assumption? If you have, can you give me some information on what to expect, especially working with HUD and their rules?

(i.e. have RE prices increased in the area, is there room for additional appreciation, how is the STR and LT rental market, any new housing or commercial developments?

I have done land subdivision and develpment, and have owned multi-family, as well as commercial property. 

If it is zoned 5+ MFH, Mixed Use, and other commercial uses, then we would look at it as a commercial property. 

This is a common strategy, but it's important to note that because the mortgage remains in your name, your DTI is still affected.If you opt for a commercial loan, which typically comes with a higher interest rate and a 20-year amortization, you can purchase the property directly in an LLC.

My client owns 3 SFRs and a commercial building for their business (in an LLC, used by the business but with personal guarantee).

The only way I could see withdrawing a 401k would be on a commercial deal where you can develop the land and increase the equity through revenue