Welcome to the site and feel free to ask questions.
Please here are very generous with sharing what they have learned.
Also, very good articles to be found here to help you save money by chosing gear wisely that is best for YOU.
Totally understand where you are coming from....career, married, family and getting back to backpacking.
Here is my own story of how I got back into backpacking, if you are interested:
I would tell you that once you get yourself "educated" you might find that getting back into backpacking and lightweight backpacking does not have to be terribly expensive.
I have spent/blown thousands on traditional gear and knowing what I know now, I could have saved myself sooo much money by going lightweight from the start.
Less gear is lighter and it means that you are not having to buy so much gear.
The Big Three to spend your money wisely on: Sleeping Bag/Quilt, Shelter, & Backpack
Get the pack LAST, once you have figured out how much gear you really need to carry.
No point in wasting money on buying more pack than you need.
The most expensive thing you probably will spend money on is a good, lightweight sleeping bag or quilt. However, look at it as a long term investment on taking the cheapest vacations you will every have in the years to come.
Nov 2011 2 Weeks in London....thousands of dollars for a family of three.
16 Days on the John Muir Trail in August 2011 being "homeless"- $200-300.
Could have been less if I did not get a hotel room right after exiting and drove home straight, but it felt soooo good to be clean. :)
Plus, squirrels don't take cash or credit cards from you.....hard to spend money out there. :)
Good luck to you and enjoy the geeky ride that is your UL/Lightweight experience!