Why do this instead of separate leases?

My go to for lowest hassles, taxes and  transaction costs are Lease Options or selling directly to the renters. 

There are lots of local meetups and frequent discussions about all things real estate here in Sac / Norcal.

Sometimes they find a renter that will sign a lease for a high amount only for the renter to default leaving the owner eating the vacancy. 

If the tenants are on contract, you will inherit that low income until the lease is up.

Purchase price: $595,000 Cash invested: $125,000 Purchased with the intent to lease to the tenant.

My objective is to buy about an acre of land, that is already leveled, access is being done, and utilities are going to be 5 feet from the property; and then build 3-4 shell retail spots on my plot, owner occupy one of them with a business and lease out the others.I am meeting with a developer this weekend, but have some wrong numbers regarding the average cost of building a shell space. 

Maintaining that relationship beyond just the lease up process and whenever the tenant has a maintenance issue or lease expiration completely changes the dynamic of the relationship.

My leases say Tenant is responsible for pest control if not reported within 10 days of move-in.

I am considering getting into some commercial investments and think I want to go down the NNN route. Are there any books or resources you can recommend to get me started with the basics?