First, on your protein needs, you might find this interesting (research shows protein needs, even for body builder, are much lower than you think):
http://www.vrg.org/journal/vj2003issue4 ... weight.htm
Second, while popular saying, incomplete proteins and protein combing is a untrue myth.
First, here are some short editorials on it:
You can find many more just searching for combining protein.
Second, protein is just nitrogen and some other elements and amino acids, with all amino acids present to some degree, or the protein would not form, as I understand it.
When people opine that a protein is incomplete, they imply that an amino acid is missing. That is not the case. The term incomplete is just a editorial label placed on any sources whose one gram of protein has even one essential amino acid below 100% of what you would find in the label ideal protein profile (which is arbitrary - no direct human research to label what is ideal - it is pretty much taken for granted based on rats, who synthesize amino acids differently than we do.)
On higher percentage (10%+ of the total calories are from protein) plant-based protein sources, these lower essential amino acids are going to be in the 75% (grains) to 95% range (dark leafy vegetables.) Also, many beans, nuts and legumes exceed the 100% profile on all essential amino acids but on the plant sources labeled incomplete the profile is usually in the 75% to 95% range. Some lower protein sources (lower than 8%) have lower amino acid profiles but with their lower protein amounts, you are likely not counting on them for most of your protein needs, so it is mute point.
What this means:
Let's use brown rice, for an example. Brown rice is often called an incomplete protein but in comparison to the so-called ideal profile, its amino acid profile shows it to have the same or more of all essential amino acids, except lower on Lysine.
With this means, in numbers:
Let's say you ate two servings (two cups cooked) or brown rice. That would give you about 10 grams of protein, per http://www.nutritiondata.com/facts-B00001-01c21U6.html
With that 10 grams of protein, you would get the same or more of all essential amino acids, as the ideal profile, except Lysine. With Lysine, you would get 75% (you can check same reference, as in last paragraph for this) of the amount you would get of 10 grams of an ideal protein. Or in other words, you would get the same amount of lysine as in 7.5 grams (75% times 10 grams) of an ideal protein profile gave you.
Now, how does one translates 75% to mean zero, as the incomplete protein advocates imply? You do not; they are clearly wrong (either an agenda or simply unknowledgeable.)
Also, something interesting is hamburger meat. Let's take 10% fat grade hamburger meat (about what grade, a sit-down restaurant would serve.) It has a 79% protein profile, per http://www.nutritiondata.com/facts-B00001-01c21bu.html
. By the definition, it is an incomplete protein, same as brown rice but have you ever heard anyone say, "better watch out hamburger is an incomplete protein"?