Where to get advice on a new system build

For that budget used I’d in a heartbeat consider Vandersteen Treos, driven by an Aesthetix Mimas integrated amp and a great streamer / DAC combo like the HiFi Rose RS151B…..that’d put you around 20k….plus cables and wires.

at the most recent audio show Aesthetix had the Treos paired with their gear, I had Treos (now Quatros) with Aesthetix and it’s a hell of a combo.

find a dealer and…..demo. 

Dealers, shows, other nearby individuals with similar interests are all good resources. 
 

Maybe some volunteers to help nearby  will step forward. 
 

The Music Room is a large reputable dealer online with a large selection of used gear.  
 

Meanwhile if you state your goals here I’m sure you will get lots of feedback. 
 

Just be sure to always take the room and acoustics into consideration before taking a plunge. 

For budget friendly, class d has really made great strides the last few years. I’ve had several expensive tube amps, 2 over 10k, and my Orchard Audio Starkrimson mono blocks hang right with them. They should be paired carefully with a softer sounding dac or preamp. I use a tube dac for this purpose. 
As far as speakers are concerned, I prefer big sound from floor speakers. I’m currently using hybrid horns but they are quite expensive. Not sure what may fit your needs in your budget after the items above. 
Lastly, if you’re going to stream, the Wiim Pro gets excellent reviews and some actually use them at the shows. I use Lumin u2 mini which isn’t too expensive. 
Good luck. The journey can be frustrating but you learn a lot along the way. 

@bke1 

Since PS Audio came out with the PMG line of equipment, the BHK line is being sold at great prices and used is even better.  It’s definitely something to look at.