can you put Repetier on a new Davinci 1.0?

If you can get one cheap (<$70), you can put ender 3 into Da vinci 1.0 enclosure if you don't like Da Vinci 1.0 as 3D printer. Da Vinci 1.0 have very good case, you might need some work on the door, but if it cost you more to build an enclosure, it is a good alternative.

If you want to use it as Laser Engraver or pen plotter, it is also very good choice. However, it is not exactly a good 3D printer, you can get one cheap for a reason.

If you want to use it as 3D printer, be prepared to flash firmware to repetier-firmware, replace hotend wire harness and x-axis motor/endstop wire harness, replace hotend with E3D, add SD card extension cable, add glass bed, mod bed leveling screw. replace rod shaft mount to printed one, and if you do all these correctly, then you get a good 3d printer. None of these mod are expensive, but you need the skills to do it right.

Based on the fact that your ender 3 has already need a main board replaced and your geeetech a10 started to smoke, I would not recommend you buy Da vinci 1.0 to use as 3D printer (You should know yourself better and make your own decision). Keep in mind Da vinci 1.0 is xyzprinting first generation product, lots of design flaws, Da Vinci 1.0 Pro is a later generation product, some of these design flaws are fixed.