1. I think your best bet as far as a cheap and easy setup goes is a tub setup. You can pickup a tub (not sure what size your snake is, if its under 600g use a 12-15qt if over that a 32qt) for under $5 at most any big box store. Walmart, target, even the grocery store sometimes.
The hot side temp isn't bad, but a UTH with a thermostat would be a better option. You probably will never need a 40g tank its big in the vertical direction which ball pythons don't really utilize. Tanks are for fish, not snakes. If you want to have a nice display enclosure then go with PVC. It's light, easy to clean, and does wonders for temps and humidity.
2. Blood is normal with the shed. All of my snakes leave a drop or two of blood after a shed. No worries!
3. I don't think I would jump to the neosporin just yet. Let your snake chill for a day or two and then check it out. If it doesn't look infected or swollen then you can just leave it be. If it does look a little funky, you can swab it with some betadine. I will sometimes use diluted chlorhexadine on minor cuts and that seems to work well. I wouldn't worry too much though. They aren't made of porcelain! A small scrape shouldn't cause any harm.
As for him not being so friendly, give him time. A big move like that is pretty stressful!