Hi xubuckeye,
You are certainly looking at a good quality/value choice.
Carpentry certainly isn’t an area that I am particularly knowledgeable about but if you have a good design there certainly wouldn’t be any reason not to build your own platform bed. There are some links to some DIY platform bed designs at the end of post #1 here that should be helpful or at least give you some ideas. The only suggestion I would have is to use closely spaced slats instead of plywood for the support surface to provide better ventilation under the mattress (see post #10 here).
Phoenix