Our used car, that we just bought in December, died. The transmission has to be replaced and it's going to cost more than the car is worth. We're looking for something brand new that will last us a long, long time.
We are hoping for something that will seat at least 6 (DH's family is coming from Nigeria this summer), gets good gas mileage, and is priced around $20,000.  What can you recommend? 
Re: Recommend your 6+ seater car/crossover/suv/van
We just bought a 2007 Honda Pilot for $23,000 and I LOVE it so far.
ETA: Oops sorry just realized you said brand new.
Big E (6) & Little E (2.5)
Brady Phoenix, 8.29.09
Claire Zoe, 10.26.10
I love the body type of the new Honda Pilot 2011. I love the rugged look and it was redesigned to fit adults comfortable on the 3rd row seat BUT it does break the bank. After taxes and fees, we didnt want to shell out $35K-$40K. I did my research and found that the new body type was introduced in the 2009 Honda Pilot. I have been stalking Carmax for almost a month now. We finally found one for about $25K!
How much luggage space does the Mazda 5 have? We would need to fit 5 adults, 1 toddler, and all our luggage. Would that work??
It's basically a van-lette, as DH likes to call it. Think early 90's Honda Odyssey/Toyota Previa size. You should be able to fit luggage fine.
You would only be able to fit large amounts of luggage with a roof rack, which is totally doable and would cost less than $1000, still much cheaper than a honda. It is comfortable with 5 adults, if they are not super large. My cousin and I are both over 5'9" and were comfortable. I was surprised at how comfortable the rear seat was with 2 adults. I think this is especially true if your relatives are from a country where they are not used to riding in giant cars, my former boss was from Nigeria, and I know that his family was not used to riding in the giant Escalade :-)