I think buying an R8 V10 Plus at list price is a crazy thing to do. Unless you are getting a big discount (read 20K plus) off a new one or buying nearly new at around 100K you are going to take a bath. Dealers are now selling the current model Plus versions 2nd hand around 100K for early cars and I would expect owners to be bid something in the mid 80K's for those cars. So if you had spent 150K new, driven it for 6K miles and sold it back for say 90K, you have taken a serious bath. I could not justify that sort of loss, it would make me cry in pain so that is why I would not buy a new one unless the deal was underwritten by someone else. Most people who have driven the base Huracan and the new R8 will tell you the R8 is the better car and it would not come with Lambo service costs either but people usually want a badge. Badges don't bother me, it's why I can happily drive around in a Polo or MX5 without feeling my manhood reduced.
I bought the R8 because at 86K for a V10 with 550bhp and a well sorted chassis there was nothing close to the event and enjoyment. Special cars make you want to get up and drive at 5am on a Sunday morning and frankly my first M3, mt GT3 and the R8 are the only cars that have made me want to do that. Those who have driven the Plus model who enjoy a connected drive will tell you how good they are. Harris suggested it was one of if not the best cars of 2013 and I drove it not expecting to buy it or even like it, but I did and that is why I bought it. Everyone will tell you how to spend your money and what they would do in your situation....until they get there.
I buy cars that I can easily afford, aren't going to hurt me in 12 months and make me want to drive them all the time. If I can't get all of that then it's just some car....or too expensive to justify it which is why I don't have a McLaren 570S.