There are no professional wireless mic systems for less than $1000 each. Also it is impossible to record useable audio to a DSLR camera. Unless you use a real camera you need to record double system. The cheapest lavs that will give professional results are the sennheiser G3s they cost about $600 per channel and come with a crappy mic. To get professional results out of this cheap system you should also buy aftermarket lavaliere mics from Sanken countryman or DPA.
Please understand that you need to learn how to produce and come up with a budget.
$200? You have obviously never made a film before. Professional wireless audio systems don't exist for $1000 each. Whatever you are getting at $200 is absolute garbage. The industry standard is Lectrosonics and goes for approximately $5000 per channel. Hire a sound mixer who knows what they're doing. Oh wait you don't know what youre doing because you can't even come up with a budget to afford crappy equipment much less hire professionals. Making a movie starts with producing, do us all a favor and get out of the business!