1) Barely adequate budget 2) Kind of operation or catch 3) Lace 4) Lacing 5) Low capital 6) Minimal nest egg 7) Shoe lace 8) Shoe string 9) Shoelace 10) Small sum 11) Small sum of money, slang 12) Tight budget, figuratively 13) Tiny bankroll 14) Type of start-up budget 15) Very small amount of money 1) Fry 2) Lace 3) Shoelace 
A very tight, barely adequate budget
The Mercury Air Shoestring was an American single-seater racing monoplane first raced at the Cleveland National Air Races in 1949. In 1951 the Shoestring won the Continental Trophy Race at Detroit. The Shoestring was a wire-braced mid-wing monoplane of mixed construction powered by a Continental C85-8 four-cylinder horizontally-opposed air-cooled e...
[n] - a small amount of money
shoe string noun a small amount of money; `he managed it on a shoestring`