If your asking if you can set a H24 to record. Than no you can not. The MRV is only for you to view your recordings from the dvr to your standard hd receiver.
Cut trees man. No tech is going to go through all that just for upgrade money. Not even an lead tech. Honestly 1200ft of cable is nothing but a bunch of problems and money. I do areas like yours everyday. But I've only never got a signal 2 times in 2 years. There is a spot just got to spend...
HR24s run hot a lot. I've been to houses on service for this issue many times. Some will run really hot some won't. Now on the H24s I haven't seen a lot that run really hot.
