How do I speed up my woodworking projects ?

Read books or Google it.  I know so I have been there done that.

Aunque se trate de trabajos manuales, siempre hay que pensar en qué es lo que hace que la industrialización supere a lo manual. La respuesta es el trabajo en serie. Ahí puede estar tu solución: por ejemplo te planteas hacer cinco mesas iguales. En un primer paso cortas todas las maderas para las cinco mesas. Luego lijas todas las mesas, luego barnizas todas las mesas, etc. El trabajo en serie aumenta la productividad. Y como bien lo dijiste: lo principal es contar con buenas herramientas. Aquí puedes conseguir cosas interesantes- https://ferretenet.com/

You should be working on several projects at once so that when one is drying you work on the others.

There is no way to speed up sanding, it is what it has alwasy been. Of course you can use power sanders to get it most of the way there, but you still need to feel, by hand, when finishing.  You can also get clear coats that dry faster then others, but it is still a time consuming process to do it properly. Best to be working on other projects while one or two are drying, need separate areas for that also.

Feel the pumped out ones, you can still find flaws in the finished sanding and such. There are shows/videos as to how manufactures finishes these items, you can't replicate it at home.

Have two commissions on the go. Buy decent materials that require the minimum of finishing and while one is in the clamps, be working on the next one. You can't compete with Ikea who produce their iconic bookcases at the rate of one every three SECONDS, so there is no point in trying.

There is a reason well built hand crafted furniture costs more than mass produced junk.  It takes the craftsman time to do it right. 

Practice and experience will shave some time from your production, but hand crafted is not fast.

use quicker drying products, lacquer dries in minutes

If you are asking how to do things faster, instead of stronger, I recommend NEVER buying anything you make.

You literally stated you want to sacrifice quality for quantity.

ask someone to help you do it

Pipeline the process.

While project A is drying, work on building project B.