Build thread coming :D.

There is a Culligan water place across the street from my shop. Should I use that water? Or is it a big enough difference to fork over for an RO/DI unit now? I just used tap water back in the day, but did have problems with algae.

As long as it's RO and not remineralized or mineral water that should be fine.
But in the long run an RO is probably a better investment.

That being said Vancouver doesn't charge per drop of water, so that may factor into your home costs.