The best thing you can do when buying tools to use at home is to have a plan of action. Do not randomly go around the store buying every tool you think that you might want to use in the future. This is especially true when you are getting wood working tools or other such items. The thing with tools is that you should only buy what you need. If you are buying tools years before they are ever used, these items will simply sit in a drawer in your house collecting dust.
Buying tools gradually also gives you more purchasing power, which will result in you buying more expensive and high quality tools. Always get tools that are high quality. Why is this important? Because you want them to last for a very long time. It makes more sense to spend $100 on a tool that lasts you for many decades, instead of paying $30 for something you have to replace every three or four years. Read guides like these on finding the best band saw before you go to amazon or somewhere else.
Some tools are great to have around the house, even if you are not going to use them often. Since they are inexpensive and easy to maintain, you can keep them stored in your garage and shed for emergencies.
However, it does not always make sense to buy a great deal of power tools. For one, you are not going to use these power tools that often. Unless you are really planning on doing DIY projects on a regular basis, you may want to consider renting power tools.
The other downside to power tools is that you really have to spend a lot of time maintaining them. If these tools start to collect rust, or one of the parts stops working correctly, you may have to replace the entire tool. This is why it makes more sense to rent these power tools instead of buying them especially if you are only going to use the tool one or two times a year.