1. you want to make it similar to google so why bother, google already exists so u wont have any advantage over them.
2. $10k no is not enough because u cant develop the system in one go. google did thousands of itterations, you need to do thousands too.
3. you need an entire infrastructure and you need a big ass team just to manage it and keep it running.
4. google doesn't have a crawler and just that. thats the tip of the iceberg. they have 99% behind the crawler (e.g. anti-spam) and without it your engine will be full of crap/spam.
5. frankly with $50k total cost you wouldnt even be able to run a clone of majesticseo or ahref and thats just a fraction of the data.
6. you do realize you will need several datacenters worth of hardware, teams to manage and 70%+ of the cost will be with power and HVAC not the hardware itself. Google has a big ass DC cooled with water from the river 363 days/year. that's almost zero cost with HVAC for that DC.
7. if you want to profit from this you won't. even if you manage to build this and run it google will just sink you through other ways. think behind the curtain games.
8. if u want to make big money there are tens of thousands ideas which are more realistic tha this.
9. look for some videos of google tech people talking architecture and scaling and you will understand how far from it you are. they inovated almost everything. they invented a linux distro, they invented filesystems and daemons and all sorts of software and algorithms.
10. the post you made by itself tells me not only you're not close but you are 1000 miles further away than you think and there are a billion things you never thought about that will appear as problems.
11. google was built and started to grow when the web was very very small. tiny compared to today. not only that but they were the first and they built something that was a solution to a problem. you don't provide a solution to a problem. in your case is something more like building a nice machine gun designed to fight against somebody who has 1000 nukes, 20 aircraft carriers, 1000 jet fighters and 1000 tanks. just doesn't work.
12. google is worth like 50 billion. they have 50 billion ways to bury you alive at the very first sign that you may be a problem for them.
13. look at wolframalpha.com - awesome concept, not nearly as succesful as google.
14. yahoo and bing are in a coma and they started about the same time with google and had more money than google initially.
15. part of the problem you have is same problem yahoo/bing have - patents google owns. you cant implement certain algorithms like PR in your engine because google has a patent on it. that is one of the reasons yahoo/bing couldnt compete with google.
16. you have a chance though if you somehow get Chuck Norris to help you... Chuck Norris doesn't have to crawl the web, he already has all the information in his memory - he was born with all the info that has been, is now and will ever be on the web.