I live and invest in a classic "cash flow markets" (which has seen 8 years of steady appreciation and is hyper competitive and has very little inventory), and I would not feel comfortable to promise you quick and easy cash flow, certainly not within the time limitations of a 1031. 

I would suggest to start researching Idealista, however even before that thinking yourself where you feel comfortable to invest and what your investment plan would be.

I would put the student loan on an automatic minimum payment plus some comfortable, but not too large, additional principal payment (if available) per month, then forget about it.

We also put "Please take off your shoes" signs, along with a shoe rack, right inside the front door, to limit dirt traction.

look at your experience level with reality in mind.I would want to feel very comfortable about those things before spending time on deals and money when i had no real capacity to transact no matter who the lender was.

If I buy these lots—7,500 square feet with a 50’ width—how comfortable can I be that the person who buys them from me will be allowed to build a house on them?

If you want to be generous about it you could tell the tenants your operating costs are consistently going up (which is true), share the current comps with the tenant, and ask them what kind of increase they would be comfortable with.What are peoples’ thoughts on where rent’s should be set or the best way to get them up if you fall behind?

I needs to be comfortable for the group.You need to decide what your demographic is.

Note that they were sub-1% during the COVID era, which is what allowed many delusional syndicators and funds to raise money for properties that were doomed to underperform.So ask yourself this as if you are in their shoes: you could invest in T-bills to get a guaranteed 4% return, then what is the premium I would require to invest in this person and their commensurate deal?

Instead, I decided to take 15 minutes assuming I was in your shoes and looking for someone to manage a project in that location.