You might make your goal or at least come close. You've got most of the big pieces. The two biggies you have left are windshield frame & stanchions and paint. If I recall, my windshield frame with stanchions (all chrome) was around $400 and I spent a little over $450 on paint and materials (all basecoat/clearcoat urethane).

The interior can get pricey if you have to pay someone to do it, but you can get by really reasonably if you can do most of it yourself. In my Track-T I cut luan plywood for the side panels and covered them myself using 3M spray adhesive and black vinyl from an online upholstery fabric store. My seats came from Speedway and already had snap-in black vinyl upholstery. The carpet came from Lowe's; I cut to fit and glued in with more spray adhesive.