Do you have to get a kit, because if my conversion chart is correct that is about $135.+ US. Kit 2 worries as does kit 1 because it appears the light goes on the inside, a very bad idea. The thermometer is probably not a good one, as mentioned you would need a thermostat or rheostat. The hide can be an old butter tub. Aspen makes a better substrate than that red barky stuff IMHO.
If you are getting a baby better to get a 10 gallon for first year or two it will feel more secure around $15.00 US with lid. You can get a twenty long later.
FWIW I would check out the prices individually, I think you could do a lot better money wise bought seperate. susan