Hello,

I haven't printed full 3D buildings yet but I've looked into it. I use a Creality Ender 3 and find it absolutely amazing - it's the best low-cost printer out there in my opinion. It can print in high detail too depending on your settings. Here's an example on eBay:

https://rover.ebay.com/r...f%3Ag%3ABsMAAOSwYTBeQn5X

A standard HO scale building a couple inches square / rectangular would likely take 5hrs or so. You can print the box or each wall separately and then glue. You'd likely then want to just use a plastic card to make the roof and not 3D print that. You can also make details like roof vents, railings, fences, etc.

Here's an example of a simple fence I made that took just a couple of minutes to print:



Paul