The trick to cutting cost spraying is dont spray. As an example take a hard and fast rule all new trees wont be sprayed. Lets start here and say your going to plant a new spray free block
Persimmons
Mulberry
Pawpaw
Autumn berry
Jujube
Lets talk about fencing maybe you have a perimeter of blackberries.
If i was in africa and surrounded by lions i would sleep like a baby inside a blackberry perimeter instead of an expensive fence.
Sure they would try to cross them but after they lost half their hide they would decide the juice wasnt worth the squeeze. Anything you shock with an electric fence will remember it. I would start there in the short term. A fence about 6 inches off the ground catches most animals with the electric jolt.