OK. Apologies if this is the wrong forum, I wasn't quite sure where this best fitted.
So after a decent hiatus I've got the bug again. And I've well and truly reached the limits of my old EOS400d and 50mm lens, but shoot to it's strengths.
With 2 young kids and a mortgage I'm also very tight on cash flow for toys.

My preference for shots is all over the shop pending my mood, moody portraits. Street Art and random shapes. and then Landscapes and stars when camping/hiking.

I can see two options ---- buy a 2nd hand L series 24-70/105 soon, deal with it's shortcomings in the short term on the cropped lens. Then in a few months, purchase a second hand 5d. Pros being I'm shooting more sooner, con's are heavier and older tech. but it also takes the couple of lenses I have floating around.
Option 2) and the one that I suspect is more sensible, purchase a second hand Sony A7x and equivelant lens.
pro's being much lighter and better in low light than the 5d. con's are much longer wait.

Both options are around $2000. hopefully less pending bargins found.

I think I'm leaning to the sony, but at the same time. The wait will torment me.
Any experiences or advice welcomed.