THIS.
Buying a console is dumb (no offence). Even buying a 10k console (which isn't even worth it but whatever), you're looking at an annual cost to you of at least 5000$ being generous. Parts,labor, a good tech, power...all these things add up.
i know it "looks" better to clients, but it will be a huge waste of money and you'll regret it forever. If you have 10k to spend, start buying some top end gear: converters/pres/mics/monitors, OR make what you have look incredible. If people are walking into your studio and walking out cause they don't see a console, then they need to be educated in the fact that that shit is old school and dumb. I split my time between a studio with a console, and a little overdub studio. Whenever I show bands the overdub studio, they immediately ask about whether they are sacrificing quality by using this "tiny room". All it takes is a 5 minute conversation about the tools YOU DO HAVE and generally their minds are put at ease.
Don't buy a console. Just don't do it. Most studios won't admit it, but almost every owner of every non iconic major studio is trying to think of ways to unload their consoles and adapt a more hybrid studio. I don't know what DAW you use, but a Eucon/Avid control surface, with a few great eqs and pres is way more of a draw for most then an aging soundcraft or something.