If you're looking for a computer to sim on; save up for a
laptop or desktop that meets game requirements (and then some) because you want the option to add packs later. Do not purchase a tablet with a Windows operating system for PC gaming. All tech related questions are supposed to be posted over @
EA Answers HQ - Technical Issues now. When you're ready to shop, post over there.
Another option is to purchase a used or refurbished Xbox One or PlayStation 4 console. Then grab the base game on a good sale. Unfortunately, the offer for a free Sims 4 base game copy is PC only so you couldn't get that on console free. The console version is supposed to be very similar to the PC version. The difference being packs release slower and you can't use mods or custom content.