This radio will work for what you want, however you are stuck on negative shift 75 mhz. You may want to look at Polks Tracker III , it is a computer radio, works on positive and negative shift ,holds 99 models in memory and on and on. They were selling for $99 and it is a 8 channel radio. Yes it is getting hard to find 75mhz stuff but if you have the option of pos/neg shift, most any 75mhz receivers will work. There is a guy selling Multiplex 7 ch. receivers on 75mhz for $10 each, new in the box on Ebay. They are new and work great. Xtal's for them come from Hobby Horse, or Tom's rc. Don't get me wrong about the Hitec radio, it's a great unit. If you can get extra receivers for it ,you may be set. However, Hitec Supreme 8ch receivers are drying up.
One great receiver to look into is a Sambra SL-8. These are bullet proof and work great. No xtal and you program it to your channel. Very small also.