2 vs. 4 or 5 how many drip investments should i Have???

im 21 years old an am planing on using my 3400 tax return to start some drip invest ments with Coca Cola (KO) General Electric (GE) Johnson and Johnson (JNJ) Mcdonalds (MCD) but the problem i have is i would like to invest in all of these but doesnt it make more sense to ivest in 2 vs 4 or 5 becase i could have more shares in 2 and money value in 2 and since i am 21 i dont make lots of money to spread around to 4 or 5 accounts to obtain shares to add up. whats the best way to go about this??