I gotta disagree with Steph on the jib and furler stuff.
The convenience of a roller furling jib is worth the extra $ in my opinion. Just pull the furler line and the sail rolls right back up. It's one of the most rewarding things to do. Opening the jib/genoa is just as easy. Want a smaller sail, don't pull it all the way out and tie off the furler line. I had a hank on jib on my first boat. Still remember clinging to the bow pulpit as the boat crashed through a wave soaking me. Na, keep me off the foredeck please by having a RF head sail.
I don't know about resale, but it cost me $250 plus shipping to simply have a sunbrella sail cover sewn into my jib. The deluxe 150 Genoa cost me under $800 new. I would strongly think the head sail thoroughly and do it right from the start. Now my RF jib is in a bag. Wanna buy it? Can't comment on how hard it is to add the furler afterwards, I'm just glad I bought it at the start. Changing head sails for me requires dropping the mast.
To be honest, if you are new to sailing, a smaller head sail probably makes more sense. It has less power and is easier to manage. However, I got tired of not moving at all in light winds so I bought a 150 genny this year from Judy B(see ad above).
Porta Potty:
We started with a small 2.5 gal and upgraded to the 5 for longer times between dumps (no pun intended).
So the porta potty solution requires a brave person to take the sealed tank off the boat and pour it into a toilet someplace. There are some open pit toilets that we sometimes dump ours into or wait until we get home. But you have options to dump it in a standard toilet (if allowed by the owner of said toilet).
The PP has fresh water to flush with and if you use good chems, it has almost no odor at all.
The next option is a MSD porta potty that is more versatile. Search this forum as potties are a common topic.
http://www.amazon.com/Sealand-MSD-Sanip ... B002MYQN2G
This one allows for "hard plumbing" it to a deck fitting for pump out. Our marina charges $5 bucks and I'm cheap, so I won't do this option. But it's there if you want it. I believe these potties can be dumped or pumped (someone may correct me). I've also heard that some places in Canada prohibit porta potties.
Lastly, a full holding tank and marine head. This requires more storage consumption for the tank (a premium) and a pump out when it's full. Some have been stuck when marinas closed and they had to trailer their boat home with full waste. It has more capacity and for some people this option works.
After 4 years, the porta potty solution works for us. Just remember, despite the photos, the head on a Mac requires either a small person or a contortionist. We removed the door and added a curtain.
--Russ