Yes wire it into any hot 12v. That is if you got the 12v one. They also have a battery operated one. Where are your house batterys? Wire it to them and then put the booster in that compartment.
Just a question, How long is your Sunseeker? I have the sister to Tracker , Tire Minder and I have a long bed 2500 and 34ft 5th wheel, my display is about 25-30 ft from the sensors and don't have a problem without a booster. Just wondering.
Have you tried this, with your display on, unscrew one of your sensors from a tire. You should get the red flashing light and the alarm reinstall it and you will get current PSI. If you don't, carry the display in you hand to the tire and try the same procedure. If it doesn't work then you have another issue.
Hope this helps
2007 Chevy 2500 HD 6.6
2012 Sabre 31RETS
(LA) Lower Alabama