Building acoustics is not THAT difficult. Requires a bit more precision at a few more steps along the way, you work with thinner pieces of wood, and structure makes a huge, deciding impact on sound, whereas electrics are more or less just hunks of wood that require a solid neck to body joint and accurate fret spacing. This is a vast over-simplification, of course, but still.
In terms of tools, you can do either on the cheap, and an acoustic really only requires access to a drill press for a few steps, a laminate trimmer, and hand tools. Although a thickness sander makes a lot of things much easier. It's a bigger challenge, requires more molds and forms (the way I do it, anyway), but once you're tooled up/jigged up, if you've got a decent book to follow, it's certainly possible to make a good sounding first guitar.
In terms of material cost, a good to decent set of wood +hardware for an acoustic is cheaper than for an electric, simply because bridges and pickups are pretty expensive. I can probably put together wood +hardware for an acoustic for around 100-150 bucks ((african) mahogany or rosewood back/sides, colorful euro spruce top, (african) mahogany neck, rosewood or ebony fingerboard, gotoh tuners, truss rod, fret wire).