NNN 20 years + investor and broker.
Usable dirt it sits on size ( 1/2 acre ok, 3/4 acre good, 1acre plus best ) and parcel shape (most of it road frontage for land or is it narrow and deep? regular rectangle or square size or irregular?)
Tenants are looking for parcels that fit in their ideal box size layout for building and parking spaces requirements with any drive thru's wanted. The tenant is not as much focused on rent when they are strong regional to national in nature but the best spot they believe drives the most sales and profit annually.
It's the lesser quality smaller tenants that are more sensitive to rents because their model is not often proven with scale or over time as much.
So you have to know what you are buying and what to do with it.
I buy same stuff for cash but I am the GP on the syndications and my LP's put in minimum 200k per deal as accredited investors.
To convert the bank to medical would be very expensive. If the bank is a certain age of construction most tenants want it torn down and build new. This all comes with time and experience. After you buy many dozens of these nationally you learn which ones are hero's and zero's.
If you take 750k of your money to buy cash but you have little experience your risk profile is very high. If you invest with someone doing it for decades at 200k or more your risk can often be way reduced due to the knowledge of the sponsor. You can learn from the sponsor on the deals and then go out on your own if you desire or later decide you are happy to keep investing and not put in the work yourself. It is WORK to turn these properties around. Often not as much as retail centers with lots of property management but still takes work, knowledge, and skill.
I have a whole process I have developed to assess risk.
Hope it helps