>>1385214An affordable alternative I thought of is to purchase a pocket shower or one of those pressure showers where you fill a bag with water. Instead of placing it in the sun to heat the water, which is only viable during summer many places (seems like a lot of posters are unfamiliar with winter), you can place it next to a fireplace/fire/stove, or another source of heat.
Also, feel free to ask /k/ in one of the innawoods threads as people seem to be nicer there.