I work in IT and build computers for friends all the time. I just recently built myself a new rig to run skyrim with 4k textures/ENB.
I could help you poke about for an affordable PC that would suit your needs. I assume from your posts you would want a tower, rather than a laptop, and also, would you be opposed to building one?
We might become best friends. LOL. My wife does photograph stuff on the side. She has a laptop for most of it, but she has been considering a desktop lately. I talked to my dad about my old desktop, but he doesn't think it has the ability to be upgraded like it needs to because it is so old. He is suppose to check on a tower my brother left when he moved out. Should be big enough just needs some minor upgrades. After all he played COD with all the different aftermarket map packs.
I would like to run the same mods she is running. I would also like to add some armor mods. I really would like one of the texture mods, however, being as I have been playing skyrim on the vanilla graphics it isn't a big deal.