They are responsible for submitting progress, materials receipts and held to strict schedules for completion.

I can no longer afford to do so and am looking for alternatives.

If you put less than 10% down, you will pay Mortgage Insurance for the entire life of the loan, if you put more than 10% down, you will pay for 11 years; even if you put over 20% down...Alternatively, you could use your current income and buy your primary in the new state now... there is no rule that says you can't own two primary residences... 

Both labor and materials are extremely hard to come by and get on time.

I have no idea what the cost would be now with labor and materials as high as they are.

Nit sure if they could command the same rents as a srick or manufactured.Manufactured have about all the same benefits of traditional stick built but are generally faster to build and slightly cheaper.Stick built- most expensive but made from common materials, easier to appraise, but take longer to construct. 

Now, inflation and scarcity of materials is making even that a difficult play. 

@Wes Singleton - that is a good point, however on the development side of things you're looking at highly fluctuating (increasing) material costs as well as challenges on timing due to labor shortages. 

Alternatively, maybe there is an opportunity to flip the land to one of the neighbors, expanding their lot. 

There are some HML/alternative lenders out there that will lend on cannabis related properties.