I'm chiming back in again to say that we're in the middle of a major house flip. (Sorry, I know some of you know this, because it's taking for-freakin-ever.) DH is a painting contractor with a lot of building experience. That man can do anything. We will NOT be DIY-ing the countertops. Last night, we had a double birthday dinner with his brother, who is also building a new house for himself. The conversation turned to our next door neighbors, who just did a massive tear down and rebuild of their house. DH helped him a bit by painting their house gratis. DH was telling his brother that the neighbors chose quartz countertops, done by [XYZ Company] and what a terrible job the installers did, so even the pros don't always get it right.
Speaking of new Formica, have you seen the new style that looks like brushed aluminum? Sweet! Alas, DH says if I put it in a $1.1M flip house, it might not appraise, so I can't use it. Boo-hoo.
And Partgypsy is right. Formica and BB require a drop-in sink. If you do the now-and-later scenario, you might then want an undermount sink, and they aren't cheap. Do you have a drop-in sink you can use temporarily until you put in the quartz countertops?
Finally, quartz is very, very heavy, requires specialized blades to cut it perfectly, and special techniques to join the pieces. If you DIY Formica or Butcher Block, you have a reasonably good chance of success. Starting with quartz with no experience could be a recipe for an expensive disaster. If you ever watch a DIY show on HGTV, pay attention to the number of people it takes to install the countertops. And that's after they've been measured and fabricated elsewhere.