Engine replacement

Okay, so I have a ton of miles on my vehicle listed above, about 250,000. I love this car so I would like to save it. It has started to go through a lot more antifreeze, it’s getting a little hotter than normal, and it takes longer for the heat to get warm. It has also started burning through oil like crazy. One time I was driving and it gave me no warning that the oil was low but it shut off and wouldn’t start again until I put some oil in it. Ever since then it has been going through 3 or 4 quarts a week and the engine has been knocking really bad. It’s always had a little knock but not as bad as it is now. I’ve decided I want to try and save my vehicle because besides the issue, I love it. On average I probably drive about 3 to 5 thousand miles a week. Yes, that’s a lot but it’s necessary. So I ordered a new motor for the vehicle.M it has a 6 month warranty and I’ve made arrangements for someone that knows what they’re doing to replace it but my question is, was this my best option? Could I have avoided buying a whole new motor and done something else? Or should I have just taken it to the junk yard and found a new vehicle?