
Welcome to the forum Shaun :)
Are you in the UK or USA? It sounds to me like you need to go to a Vet whether you can afford toor not , maybe if you explained your situation and asked them to arrange part payment so you can pay weekly for any treatment , they would help?
You need to treat the DOGS so they dont get ticks , not treat the whole yard. There are plenty of ticks and flea treatments available and you HAVE to use one , especially if you know there are ticks on your land. Ticks can pass on Lyme disease and it can be very dangerous. Lyme disease is on the increase in the UK and is rife in parts of the USA
Go to a vet!
Melody :)