Not sure on your unit, whether you have a built-in or external cord. On our previous TT we had the built-in cord and it was 25'. Our current TT (30amp) is just an external cord that is not attached to the camper until you connect it, so you can use whatever length you want. We carry two 25' cables just in case we are ever camping where it's a longer distance to the power, but we've never had to use the 2nd cable so far.
As far as shore power at home - we have a converter connector we use while parked at home to be able to plug in the camper to a regular household outlet. I'd love to put in a 30amp service box, but don't have the capacity from the outbuilding next to where I park the camper, and don't want to go to the expense and trouble of pulling cable underground, etc from the house panel to where we park the TT. The regular outlet is fine for keeping the battery charged and having enough power to check everything out when packing for a trip. We just can't run the A/C when plugged into the 20amp as it pulls too much power and will trip the breaker.
So, basically we've found that we didn't really need to run a special 30amp circut just for the TT since the regular outlet provides enough power for what we need to keep the TT charged up while being stored.
2012 Flagstaff V-lite 30 WTBS
2011 Ford Expedition
4 kids and a hubby & never enough time to camp!
2011: 17 nights 2012: 26 nights 2013: 46 2014: 20 2015: 16