This should really be a new thread as it does not have anything to do with stoves........
It would probably be best to ask about this model of Mac on one of the many Mac forums. The owners of the 26X will know what to look for. If you could connect with a Mac X owner in BC to look at the boat with you that would be the best thing short of an actual survey.
You should also have good look at the trailer tires and brakes (it should have brakes if you going to tow it home through the mountains). Repack the wheel bearings before heading out on the highway. If the tires look like new but are over 5 years old think about replacing them, carry a spare, a 4-way wheel wrench and a way to jack up the trailer if needed. Bring extra fuses for the tow vehicle, a trailer can knock out your lights at the worst time. I hope you have good tow vehicle, a pickup would be great. The ads showing trailer sailors being towed by small SUV's is not realistic when they get up to 26 ft., especially in the mountains.
I assume you do know this is a water ballasted motorsailor with a big engine. One did capsize a number of years ago because the owner drained the ballast out motoring out to an anchorage, then sat at anchor all evening with about 12 people on deck. As he left with a sharp turn the 50 hp engine capsized the boat with all the weight on deck and no ballast, two young children drowned. They do have a warning sticker about not doing this. I don't want to rain on your parade but thought you should know about this mistake that one owner made. Lots of people own Mac 26X's and love them and are safe but these warnings are given for a reason. Please re-think bringing a gasoline stove into the cabin. You can find a good safe used alcohol stove on ebay, a marine consignment shop, flea market at a good price and it will be safe for you and your passengers. (there I brought it back to stoves !

)
Good luck, you will enjoy sailing I am sure, Bob