Well Liz to be honest you worrying about him being dirty is kind of silly. They are burrowers and this means dirt. So they are going to get dirty and that's completely natural for these frogs. Kind of selfish if you risk stressing your frog by not allowinng him to do what comes natural just so you can see his pretty colors. You can see their colors in full splender right after they shed so you do get to experience that. Eco Earth is supposed to be the best and safest substrate for these guys that you can buy despite the issues that I've had and others. I still believe it is best. When it comes to lights for heat you want to buy a lamp with a dimmer switch so that you can control the temp and light output of the bulb. 50 watt max/25 watt minimum. UV lights are fine as long as they aren't too bright. They don't need UVB because those reptile bulbs are to help the metabolize calcium by producing D3 naturally through the body. They get there D3 from the calcium supplements that you use that contain D3. Also all UVB lights are fluorescent and they don't produce a lot of heat and are usually too bright. Plus they can't be used with a lamp that has a dimmer switch.

A 10 gallon tank is fine. Use the Eco Earth or Plantation soil. They are both Coco fiber. They are safe for the frog if accidentally ingested during feeding. Since your little guy seems to get upset over handling and force feeding I would let him feed in his home. Keep an eye out to make sure he is actually eating his food and it isn't just burrowing in the substrate. If he doesn't eat continue force feeding. When he's recovered he'll eat. You could use the tub idea as well. A lot of people have kept their Pacs in these and have done well. To help with humidity cover half the screen top with a damp cloth or cover with plastic wrap. Make sure if you decide to use plastic wrap and a lamp don't place the lamp over the plastic. Could result badly. Especially if it gets really hot. Tossing the substrate helps with humidity too. Mist as you toss it and the soil will release moisture into the air of the enclosure easily.