Jay Conner is known as the Private Money Authority and is doing a 3-Part Free series of training on how to do real estate during the Coronavirus crisis.  
You can view parts 1 and 2 on Youtube:
Part 1 on Raising Pri...

If they are all brand new, keep in mind (for now) they are not subject to Los Angeles rent control and for the first 15 years not subject to state rent control. 

You're subject to 20% withholding for taxes if you take any money out of your 401(k) and pay it to yourself.

There are some sample manufactured home purchase agreements in books on the subject.

Student housing may be tough right now, with school closed down, but at least accumulate all the knowledge you can now on the subject.

This would be a basis for me to outline a business model if I were doing what you do (I used to but bought stuff along the way that I can now live off my cash flow.

In Chicago we are required to file an affidavit with the eviction complaint stating the owner is not aware the property is subject to the CARES Act.

The ethics complaint has been submitted to the bar now-a 100-page document with all of the attachments outlining his conduct.  

As far as a real estate specific book on the subject, I like Finding and Funding Great Deals right here on BP.

From the buyers perspective, you want prorations based on rents due in contract as well as terms outlining any outstanding balance will stay with seller, but that buyer will make "best efforts" to collect.