Should I recap my speakers? If so who can do it?

The parts costs quoted seem reasonable. I did some speakers for my neighbour, cost about $1000, and dramatically improved every aspect of the speakers' performance.

I'm retired too, and it's my hobby too, but I'm not in the business. The posters above should be able to help you a lot.

But don't go cheap on the treble crossover capacitors. I would spend the bucks to get film and foil, preferably styrene and tin (MIT sells a good one) on the treble signal path. In this case, you get a LOT for what you pay, maybe the best bang for buck in the whole audio chain.

I would contact Peter at PBN Audio. He is very honest, he has built many a speaker, amp, pre amp, turntable.  Will not blow any smoke up your speaker so to speak. He is a old world craftsman when it comes to the repair or making new. With lots of electronic knowledge.
Good luck

Just read this thread and I gotta say it's really cool that grannyring and timlub chimed in to help the OP out. It's a testament to the the "brotherhood" of those that are so well versed and experienced to help out a fellow audio appreciator in need. 

Wow! Thanks for all the responses! I appreciate all the information, now I just have to think it over. 

As for where to buy the parts, there are several really good sources. I tend to use Michael Percy Audio and Partsconnexion.

When I got serious, that is when I retired, I built a break-out box to test capacitors for speaker applications. My experiments (two alternative forced choice, single blind paradigm) showed that the most important variable is technology: film and foil is best alternative, then metallized, then other. Second most important is materials: among the metal foils silver is best, but prohibitive; copper almost as good; tin is cost-effective; aluminum can be problematic because of the connection between the wire lead and the metal foil. Among the insulating films, styrene is most neutral, teflon somewhat bright, polypropylene somewhat muted. Third most important is brand.

The best manufacturers are very open about the technology and the materials they use - they brag about it, and for good reason. You can profit from their openness.