My advice if you plan on hunting for several more years get the best you can afford...buy once, cry once. 

My bike is 1000W Bafang MidDrive motor with a Sturmey Archer internal gear 3 speed rear hub so I have no derailleur hanging down to get hung up on stuff....I'm a bigger guy, 230 pounds and I have a custom made rear rack for the treestand and my bike can haul me, gun / bow; back-pack and a Summit Viper anywhere I want to go at Ames Plantation....when I kill a deer, I take the gun/bow and the stand back to the truck, hitch my deer cart to the bike and ride back to get the deer...

I shot 3 does one morning about 3-4 miles from the truck and I rode in and out 4 times....I'd have never hunted there on foot.  

If I knew how to post a video, I would show one of the bike in action.