I addressed your questions about working in the other thread, so I will limit this one to your questions about a local flight school.
I fully understand your desire to keep working while in training, but think about this: a local flight school is going to take you significantly longer, maybe even years, and especially while working. They might promise you that they can do it quickly, but they will fail almost every single time. You will find that small schools often have issues with instructor availability, aircraft availability, examiner availability, etc. Those delays will end up costing you time and money. The years lost flying for the airlines will further cost you money.
Now plenty of people have gone the local flight school route, in fact all three of the mentors here got their PPLs through local flight schools, but we all ended up finishing through ATP because the local schools were such disasters. This isn’t to say that all of them are, but it does seem to be the common theme.
Of course the decision is yours, I would spend some serious time investigating the various options that are available to you and asking as many questions as possible. Of course, we are always happy to answer whatever questions you may have.