You can find used (or refurbed) Lenovo workstation laptops in very good condition for $/ EUR 300 - 400,-.
W540 or 541 w/ 4th/ 5th gen Intel i7 quad core, 16GB RAM, SSD (typical 240GB system drive).
These are real workhorses w/ good cooling, rugged keyboard and UEFI (BIOS) is very tweakable.
Pairs of USB2, USB3, w/ luck 1 Thunderbolt and/or USB-C and a PCIexpresscardslot34, cardreader, fingerprint, trackpad, camera, kensington lock.
I´ve found 1 in excellent condition, Win10 Pro x64, Win7 home premium x64 and good bag included,- for EUR 360,- incl. shipping.
You can do almost everything w/ these,- music via ASIO4All and/or Scope/XITE w/ expresscard34.
I bought it somewhere last year and it runs all day in my livingroom,- I´m typing this post on it a.t.m..
I´ve put the optical drive into an ext. USB3 case and added a caddy for SSD #2 (Crucial MX500) in that slot.
Works like a charme !
My office machine (midi-tower/ Intel i3 3.6GHz quad) is now rarely used.
For picture editing I curently use GIMP 2.10.30 and Mihov Image Resizer.
The other is more or less standard,- Open Office, Thunderbird, Firefox w/ YT Downloader Express, Opera (VPN), VLC Player, PDF Viewer, PDF Creator / Architect, CDBurnerXP, IrvanView64, Audioextractor64, Handbrake video converter.
For music - ASIO4ALL and Scope (alternately,- because I use the XITE also w/ my rackmount DAW),- lots of native plugins, Reaper.
Bud