Half that stuff is wants versus needs. Get on the road and figure it out. As I posted above, consider a van at some point, much easier for stealth and privacy. Army surplus - goodwill and the sort will have great deals on things like blankets and sleeping bags. You can get an inverter to run with your car to power your laptop and charge it up for sub $50.00 on ebay. Save your money in an emergency fund for hotels and repairs etc. China freight (harbor freight) has a solar panel kit that is fairly cheap and highly rated. Cooking gear, you should be able to get a propane burner for around $30 - pots pans - go to goodwill. Propane 1lb bottles add up, you can get an adapter from amazon to refill those and their is videos on this as well. As far as the sleeping bag, I cannot recommend enough to look at a mil spec modular system, with divy. You also need and I cannot recommend this enough, is a woobie (mil poncho liner) for those who know, you know. The Marine one has a zipper, They're light weight and will provide a ton of comfort, some know these as a "Ranger Roll" too.

Half that stuff is wants versus needs. Get on the road and figure it out. As I posted above, consider a van at some point, much easier for stealth and privacy.