I don't recall saying that he did. In fact, I mentioned toward the end of my post that he may not need or want to replace everything listed. The OP did specifically mention problems with the rear derailleur and possibly chain and cassette needing replacement, a grip shifter going bad, and damage (at least cosmetic) to his brakes. In addition the bike has seen a lot of hard miles and has not received good care.

The OP also mentioned having $50 a month for six months to put into the bike. What I posted was an example of what could be accomplished within that budget if needed or desired. It is obviously up to the OP to determine what, when and in what order to do the repairs/upgrades.

Honestly, I'd have to look hard at putting much into this bike, but the OP seems very attached to it. I'd start with a new rear shift cable and housing, RD, and if needed the cassette and chain (have LBS check hanger alignment). After that I'd look at getting some better shifters (could get just shifters instead of shifter/brake lever combos if staying with canti brakes). Once the bike is safely functional, everything else is optional, but if he loves the bike and has the budget, that's his business.