I respectfully and completely disagree
You do not need a proper anything (work bench??? etc) except a soldering iron, a multi-meter and good starting chassis with decent iron (old organ unit)
Most of the other parts are pretty cheap (See Doug's store he has many excellent deals), You do not need to buy "boutique" caps or tubes . I seriously doubt any of the big amp builders of yore were listening to the sound of the caps and tubes they used, they were business men, with bottom lines who purchased on the basis of price and reliability.
Cabinets can be built inexpensively from recycled or found wood and they can sound great.
Speakers can be had inexpensively too. Most 'vintage' speakers that are expensive and popular are cheap pressed basket speakers that are popular simply because they were the cheapest alternative to put in mass produced amplifiers that became famous, they sound great but there are many equally great sounding alternatives
I will agree that it is an investment of time but you might have to invest time spent doing something you enjoy less to make money to buy that 'sweet sounding expensive amplifier"
You might as well learn something and gain a deep sense of accomplishment and pride in making something with your mind and hands.
Some basic safety precautions are needed, which requires research and happily there are wonderful places like this forum where people will offer guidance to you along the way.
So I say , do your homework, be careful, proceed methodically, and give it a try
I am a complete amateur
I have made several amplifiers for a few hundred dollars investment each and my time
I have personalized excellent sounding amplifiers, a sense of accomplishment, I have added to my store of knowledge. I didn't fork out thousands of dollars on over-priced 'vintage' amplifiers
Sounds like you've had a frustrating experience Paul
You should try making bows
They say with bow-making that you should proceed with much perseverance!..but little hope!