Custom Form not inserting data to database

I have created two custom template pages(createhome.php & insert.php)

My createhome.php has a form whose action connects to a file called insert.php

The insert.php should then insert the input to the database using wpdb->insert()

However, when I click submit, it takes me to a 404 page not found, and the url is: http://hf.mr21solutions.com/create-home/insert.php

Nothing is inserted into the database. BUT, when I navigate to the insert page(http://hf.mr21solutions.com/insert/) it inserts blank data to the database!

To see for yourself, submit the form here:(http://hf.mr21solutions.com/create-home/)

So, apparently my form is not connecting to my insert.php file on submission. Does this have something to do with my form’s action? Or is this something with the permalinks? I just want to be able to save my form’s input data into my newly created table in the wp database. If this was regular php/mysql, I wouldn’t have a problem in the world.

Here is my form:
<h2><center> Enter your home information: </center></h2>

<form action="insert.php" method="post">
                        Name: <input type="text" name="owner_name"><br />
                        Address: <input type="text" name="address"><br />
                        City: <input type="text" name="city"><br />
                        State: <input type="text" name="state"><br />
                        Zip Code: <input type="text" name="zipcode"><br />
                        Number of Rooms: <input type="text" name="num_rooms"><br />
                        Number of Bedrooms: <input type="text" name="num_bedrooms"><br />
                        Number of Bathrooms: <input type="text" name="num_bathrooms"><br />
                        Square Feet: <input type="text" name="square_feet"><br />
                        Age of Home: <input type="text" name="home_age"><br />
                        			 <input type="hidden" name="id">
                        			 <input type="hidden" name="owner_id">
                        <input type="submit">
                        </form>

Here is my insert.php code:

<?php
if(!empty($_POST)){
global $wpdb;
$wpdb->insert(
'wp_homes',
array(
								'owner_name' => '$_POST[owner_name]',
								'address' => '$_POST[address]',
								 'city' => '$_POST[city]',
								'state' => '$_POST[state]',
								'zipcode' => '$_POST[zipcode]',
								'num_rooms' => '$_POST[num_rooms]',
								'num_bedrooms' => '$_POST[num_bedrooms]',
								'num_bathrooms' => '$_POST[num_bathrooms]',
								'square_feet' => '$_POST[square_feet]',
								'home_age' => '$_POST[home_age]'
								 )
						);

                        echo "1 record added";
						}
                        ?>