Im not far off married but have a daughter with the missus so as you can imagine, cost over a long period is ok, 4K+ on the spot not so good so i feel your pain
If you Pm me your e-mail address i will send you some pictures of my engine block and circle where the feed and drain has been tapped in the block, its really very simple. Will give you a link to the company that can supply every single item you will need to build and run the engine. They are in the states but can give superb advice, they will send a base map to match your spec, you can then tweek this yourself with their software to get the map perfect.
Ian at Area 6 does know his Zetecs, but you pay for the service.