3d printer questions

Well after watching several video’s I have figured out how to make bigger parts but have to make a spot where they connect at like a pin through a hole . . The one I got was in parts and it took me about in real time about 3 days of really working a couple of hours here and a few hours there for weeks . . And set up is a file you up load via Arduino IDE and I use Slic3r and Repeiter-Host for the parts ( Slic3r is a program which cuts the part into layers and makes the G-Code ) ( Repetier-Host connects to the 3D Printer and runs the G code to make the part ) I use Linux, Ubuntu 15.10 64 bit and load Virtual Box to run Windows 7-1 in never looses the drivers for mouse or graphics like the ones who seem to keep me in stitches with all the problems they have running some video card or mouse ( Virtual Box adds its own drivers and it all works even with BIG FILES not the fastest in the world but gets there ) . . So you may have to make the BIG house in maybe 3 to say 6 parts which go together and files that big will take a lot of hours of running the 3D printer HAHAHA maybe sleep a lot LMAO
I made a vase about 3 inches tall and had curves side took almost 8 hours but I cut the size of layers down to .002 per and on lt had the top 10 and bottom 10 layers be made 100 % infill . . Words you will get to know when doing this stuff and doing the set up of Slic3r or what ever you use for making the G-Code
I used a travel indicator to get he BED REALLY level for first part and checked the flatness, was not bad ( I marked which way it was on the heated bed and re leveled the bed to the part it made ) . . Next parts were really flat ! . . I made a 3.5 inch by 1/8 inch thick washer no hole in it and marked the way it was turned . . checked all four corners after removing it . . OH yeah do not put the 3D printer close to vents where cold drafts will come from as it will make the part come loose from the board . . I built a box to put the printer in with 9 1/2 inch tall walls and a 2 foot square bottom ( so you can reach in and turn off the power supply to the 3D printer ) Now it sits on the floor just behind my Laptop . . Think I should take a picture of it . . and add it here