Need him to chip in money on his own gift if he wants AC in the hotel

My boyfriend’s birthday is the day after Christmas.

It is really difficult getting him gifts for both events and separating the two.

I usually get tons of little gifts or one giant present that I feel equates both a holiday and a birthday. This year, I am going to surprise him with a tropical vacation. I figure I have enough stuff there to be both a Christmas and birthday gift. First I will get him a plane ticket. I think the cost of that and perhaps the rental car could be a birthday gift. The Christmas portion will be all the excursions I have planned. We are going to pet stingrays, kayak and do a boat tour. The only snag is that I need to rent a condo on the beach for the two of us. The condo is not cheap, especially if you want it halfway decent. The weather is going to be in the 90s everyday. I want quality AC, a good shower and a nice bed. In order to get cooling and all those luxurious, you need to pay. I can’t really afford to get the nice condo with good AC without a little help. I am already quite deep money wise in the trip. Can I ask my boyfriend to pitch in money for his gift? I already am tackling the rental car which is not a fun thing to get. I could probably handle everything if we did a cheap motel. But, I know our room will be small, possibly dirty and will only have a window cooling unit. It will be miserable.

Heating device