Is there a way to get hot water without altering plumbing or electrical wiring too much?
Check out the 1 or 2 gallon point of use heaters that install under the sink. They run on 120VAC and are fairly easy to install with minimal plumbing changes. There are also above sink mounted hot taps that mount into the sprayer hole in the sink. These are usually used for hot water for coffee/tea etc. Both of these type products are available at your local home improvement centers.

Here are several examples:  http://www.lowes.com/Plumbing/Water-Heaters/Point-of-Use-Water-Heaters/_/N-1z11qho/pl#!