water from monsoon rains

Hello. This is not a good situation, but I want to rectify the situation so that I don't have to deal with this anymore each spring. I have a split level home with a crawl space under the living room/kitchen section of the home. The crawl space is approximately 3 feet in height. Keep in mind that when we bough this house in 1991 we didn't now anything about homes and our parents were both renters so we were babes in the woods. We get about 1.5" of standing water in our crawl space in spring. It comes through cracks in the floor which cameabout from pressure that builds up from the floor. The walls are poured and are fine. The floor is a big problem. Got no sump pump, the crawl space is vented and the cement is about 1" poured over plastic ! I'm thinking about running a trench around the crawlspace that leads into a sump pump in one corner but i don't know if i need to worry about the sump pump freezing since this is a vented crawl space. I assume that i could even put it off in the winter and just run it in spring. I'm just trying to do my best to rectify a bad situation so that when we put this home on the market the next owner won't have this issue. Ideas from the experts ? I know this is not ideal, but i'm just trying to get out of a bad situation without putting mega bucks into fixing this issue for the next home owner of thishome. Thanks for advice. Feel very lonely about this situation.:(

I'm currently framing my ceiling with 2 x 2's which will be used to hang drywall on. I have two questions. 1. is 24" on centre sufficient or should I go 16 on centre? 2. Should I be installing a vapour barrier on the ceiling, just wondering if possible condensation from pipes could damage the drywall? P.S. Drilock 2' x 2" subfloor panels are only $5.80 canadian here. That's $3.41 us. Lokks like the price in the us is higher due to importing and such. Any of you near the boarder may want to consider hoping over to Canada to buy these.