We've been full-time RVers for 6 years, and part-time 6 years before that. We have a 5th wheel trailer and use a heavy duty diesel truck to pull it. We prefer to have only one vehicle with a motor (instead of a Motorhome and a towed vehicle)
I have a sewing machine (and a serger) with us. And I stash rulers, cuting board, and a "little" fabric under the bed.
Having said all this, if you've never RVed before, I strongly urge you to get an inexpensive bumper pull travel trailer to use the first year. Make sure you both enjoy the lifestyle before putting a lot of money into a "fancy" rig. Go somewhere for a month. Try it out, make sure you both really enjoy it. That way, if you find you love it, you can "trade up". If you don't like it, you can still use the trailer for short trips and vacations.
Most of all, enjoy your retirement. We feel like we're living a dream!