Well if you're on a budget and want to use your landy then I cannot recommend enough roller painting. Shock horror.
I read about this online about 7 years ago, and since then it's grown in popularity. The reason I'm such a great believer in it is because I did it to my first car when I was about 19 and everybody was amazed by the results.
I've attached a pic of the results, and bear in mind I did this as a teenager with no experience of painting so much as a garden fence, and on a shoestring budget (incl paint, sandpaper, filler and all prep materials it cost me no more than maybe 75 quid). I used rustoleum paint, and had it mixed by a place on-line to the colour of BMC Tartan red.
The car was off the road just less than a week, and I worked on it about 6 hours a day, about 3 days were purely spent rubbing it down, filling, priming, and sanding, and then a final day of wet and dry, and that evening I meticulously panel wiped it, and gave it a coat. Left it to dry overnight, and gave it another coat the following evening. The next day the paint was still wet, so had to wait until the following day to re-attach all the trim, bonnet etc. Which I allowed a few hours for, but actually took a day and a half. In the end, it did take a good month or so for the paint to properly cure, but the car was usable about 48 hours after it's last coat of paint.
The finish was okay, and very glossy, but there a good deal of orange peel effect noticeable at half a metre or less. On a Landy, I don't think this would be out of the ordinary, and probably would be expected. (I think a pristine paint job on a landy looks out of place).
May be worth a thought for you.
Oh and if it were me, I would only paint an old landy like yours bronze green, satin or gloss.
