My portfolio consists of BTC,ETH,XRP,SOL,DOT,XLM,ADA
Your choices and options are too many to me, it increases the risk you will face and makes it so that if you are not careful, you will just be consistently loosing the capital you want to invest, and then you will not be able to meet your target of getting a house.
If you must invest in Altcoins, invest in a few (One or two), it reduces the risk and make your investment easier to monitor.
BTC, ETH and XRP seem to be enough, too many coin choices will indeed be confusing. But let's look at the potential of each top altcoin, it will provide double profits if in the bull run season all altcoins rise. You just need to choose which one is the best and use it as your main investment. Be wise in choosing altcoins and make sure you don't put all your eggs in one basket, there are many baskets to choose from to maximize long-term investment.