Merely my personal opinion, no.

This question has at least 2 major facets:   1) you personally own the property (or maybe through an LLC)  and 2)  Your 401k owns the property being rented.   

I don't know your personal situation, goals and motivation. 

The bank/lender who is selling wants the proof of funds as a bank statement with the exact name of the person on the contract.

Call the business phone number and ask to speak with the person rather than calling the number the applicant listed.- Minimum credit score of 650.- Rental History: screen for tenants who have a track record of owning or leasing property.

I am also getting leads where the person is saying they prefer to pay by card. 

I think the privacy is high on my personal priority list as well, as i may have been going overboard by researching soundproofing solutions between walls and am actually in the process of adding another layer of drywall.

What site or course do you recommend to start the Maryland Real estate sales person journey?

I’ve heard of folks borrowing from their personal network for a down payment, but is this actually used in practice?

Since you are just graduating college you may already realize that it's not what you know, but who you know (as a personal note, I had college friends that were barely passing their classes however they ended up with really good paying jobs due to "who they knew").