The hitch weight on those V-nosed ViewFinders is very, very heavy. I would be concerned about it also with your current tow vehicle. The listing is for 795 lbs...that is the "dry weight" listing. You'll have to add several hundred additional pounds to allow for "options", battery, LPG and kitchen furnishings; it mounts up fast. Consider, even conservatively, 150 lbs (and that is real conservative); you are looking at a tongue weight of 945 lbs...you, most certainly, would require a weight distribution hitch for that kind of mass to keep your 4Runner level and with enough weight on the steering axles. Figure another 100 lbs for the weight of the hitch and you are looking at dropping over 1,000 lbs of dead weight into a truck that is rated at a maximum of 1500 lbs. You also have to add the weight of the vehicle's occupants and traveling cargo to that 1000+ lbs. when you are calculating that 1500 lb. limit.
You will be right at the limit and you may be overloading the 4Runner's axles (I can't find specs for those), particularly given the age of the 4Runner. No matter how well maintained, a 6.5 year old truck's suspension and drivetrain show wear and tear. IMHO, the V-nosed front kitchen trailers are getting up on 5th wheel pin weights as far as loading goes, and I feel that a 3/4 ton p/u is a much better tow vehicle when you start talking tongue weights approaching 1/2 ton and over...
As for V-nosed trailers towing better... No empirical data to prove it. In theory if all
the wind resistance was coming at you dead on, and your tow vehicle weren't in the way, the V-nosed trailer should, in theory, have an advantage. In real life, the tow vehicle is taking the brunt of the air being in front of the trailer and very rarely will you always have a headwind, which BTW, is worse for over-all fuel mileage (a tail wind is much better for mileage). In what I've seen, read and learned talking to folks that have V-nosed trailers; utility and travel, there is no real-life towing advantage of one nose design over another. The V-nose does allow for additional floorplan configurations, but, IMHO, that is their only true advantage. Their big minus is the additional tongue weight that the tow vehicle must support by having all the appliances, pots, pans, refrigerated foods and other kitchen necessities sitting way forward of the axles.
Short version... Can you do it? Yep, the numbers jive. Should you do it? Probably not with your current tow vehicle and it's age.
PS... Welcome to the forum. Much information here, even if it isn't always what you want to hear