um... this might seem an odd question but how are you at cooking?
What if you found someone who does it for you in the other ways, took them home and fed them well? That would be unkind if done with someone who would feel bad about themselves if they gained some weight, but some people wouldnt mind having Their slave there delighting them with wonderful meals, even if some pounds crept on. It could become something you do for Him to please Him... and if His appearance just happens to alter to your taste, well you'll just have to suffer through and get Him a second helping *smile*.
Either way, in your position it seems sensible to me to go learn how to be a great cook, if you arent already. Big guys are usually big eaters and one more attraction to add to your list never hurts *smile*.