I took my A+ back in the 90s so its changed a lot...however the best thing I have seen is a community college course. The course itself goes over all the material to pass the exam and it costs like usually around $120ish dollars to take. the kicker is most colleges are also CompTIA testing centers and they will give you a voucher to take the test after you complete the course for free. The tests themselves cost like 100 to 150 each anyways, so you might as well just take the class and get your voucher to take the test.
Or, you can do what I did and just get a job that will pay for everything. that may be harder and you may have to start somewhere like a comp usa, microcenter, frys, or whatever and work your way to a tech position and then get your certs for free, but thats what I did.