My focus is on providing either turnkey-style space for those interested in temporary, infrequent use or long-term leasing for business folks who require conference room space (or perhaps event space).  

Hi Jerry, BP and local Facebook groups are a great resource for meeting local agents, investors, and lenders who can provide some solid insight into the markets you're interested in.

I also hold a couple of real estate forums in the area for people like yourselves to connect with service providers, GC's, etc. 

A minority of 401k providers will let you transfer the loan to a new provider, but I have yet to experience that option with any 401k I have had. 

Mortgage recasting is a great option for homeowners who:Have received a windfall, such as a bonus, inheritance, or proceeds from selling another property.Want to lower their monthly payments without extending their loan term or going through the hassle of refinancing.Are satisfied with their current interest rate and loan terms.How to Get StartedIf you’re considering mortgage recasting, here are the steps to take:Contact Your Lender: Ask if they offer mortgage recasting and confirm your loan’s eligibility.Determine the Lump Sum Amount: Decide how much you can afford to put toward your principal.Calculate Potential Savings: Use an online mortgage calculator or consult with your lender to estimate your new monthly payment and total savings.Submit the Request: Once you’ve made the lump sum payment, your lender will process the recasting and provide a new payment schedule.Final ThoughtsMortgage recasting can be a powerful tool for homeowners looking to reduce their monthly payments and save on interest without the cost and complexity of refinancing.

Also, did they provide you those terms off the bat or after explaining your project?

I wrote an article that I think you'd find value in that will provide some answers to your question: https://www.straightupchicagoinvestor.com/blog/6-must-knows

Quotes from successful former “students” providing their first name and last initial only 8.

I do have two really good mentors / coaches I work with that would be able to provide more input but they do charge for their time.

The only other options I can see are A) your mom partnering with you rather then selling the property to you - you become 50% owner and bring the funds and management to the rental while she provides the existing equity as her contribution; or B) your mom lending you the rehab cash out of her personal funds while also seller financing the house to you.